Vanner IT24-3500 Owner's Manual download pdf (Page 18)

Component Identification and

Description of Operation

IT SERIES Industrial True Sine Wave Inverter Owners Manual

(32.3) Auto Throttle Control (Volt Guard) Terminal 6

(See also item (4) Auto Throttle Indicator Light)

The Auto Throttle Control (Volt Guard Feature) provides a ‘ground signal’ at Terminal 6 and

turns ON the Auto Throttle Indicator Light whenever battery voltage remains below 12.6 (25.2)

volts for more than 15 seconds. The ‘ground signal’ and the indicator light both turn OFF after

battery voltage remains above 13.8 (27.0) volts for 15 seconds. The circuit is designed to

provide ‘ground control’ for a Bosch relay, Vanner part number 05235 or equal.

Use the Volt Guard Feature to control an automatic throttle on vehicles where the inverter is

required to operate continuous heavy AC loads or where other heavy DC loads are present. By

controlling the auto throttle in reference to battery voltage, the Volt Guard Feature insures that

the vehicle alternator produces maximum output when needed.

Use the Bosch relay to control the automatic throttle, Vanner 73-46 Automatic Throttle or equal.

Install a ½ amp in-line fuse near the inverter as shown.

The sketch below follows the 73-46

Automatic Throttle wiring instructions as for a Dynamic Inverter installation. This requires

separating the input signal circuit from the input power circuit by cutting the Red 18GA jumper on

the Auto Throttle Control Module. The Bosch relay may also control the Auto Throttle via the

ground similar to the Volt Guard circuit shown in the 73-46 Auto Throttle instructions. For ground

control, route the Auto Throttle’s white/black wire through the Bosch relay’s N.O. contacts.

Figure 8 Auto Throttle Control Diagram (Volt Guard Feature)

9 POS BLOCK

INTERNAL WIRING

1/2 AMP

FUSE

BOSCH RELAY

05235

12VDC

HOT IN RUN

VANNER 73-46

AUTO-THROTTLE

CONTROL MODULE

RED 18

1 AMP

FUSE

VOLT GUARD CIRCUITRY

(32.4) Terminal 7 Not used.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 27 28

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Vanner IT24-3500 Owner's Manual Page 18